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"Opposite" Magic tool: Complementary colors

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Closes https://sourceforge.net/p/tuxpaint/feature-requests/136/
This commit is contained in:
Bill Kendrick 2021-09-06 01:36:08 -07:00
parent 78ea74b5b3
commit fa23c099f2
137 changed files with 9176 additions and 6533 deletions
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105
magic/src/negative.c
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@ -23,7 +23,7 @@
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
(See COPYING.txt)
Last updated: September 4, 2021
Last updated: September 6, 2021
$Id$
*/
@ -56,7 +56,35 @@ void negative_switchin(magic_api * api, int which, int mode, SDL_Surface * canva
void negative_switchout(magic_api * api, int which, int mode, SDL_Surface * canvas);
int negative_modes(magic_api * api, int which);
// No setup required:
enum
{
TOOL_NEGATIVE,
TOOL_COMPLEMENTARY,
negative_NUM_TOOLS
};
const char *negative_icon_filenames[negative_NUM_TOOLS] = {
"negative.png",
"opposite.png"
};
const char *negative_names[negative_NUM_TOOLS] = {
gettext_noop("Negative"),
gettext_noop("Opposite")
};
const char *negative_descs[negative_NUM_TOOLS][2] = {
{
gettext_noop("Click and drag the mouse around to make your painting negative."),
gettext_noop("Click to turn your painting into its negative.")
},
{
gettext_noop("Click and drag the mouse around to change colors to their opposites -- their complementary colors."),
gettext_noop("Click to turn all colors in your painting into their opposites -- their complementary colors.")
},
};
int negative_init(magic_api * api)
{
char fname[1024];
@ -73,43 +101,69 @@ Uint32 negative_api_version(void)
return (TP_MAGIC_API_VERSION);
}
// Only one tool:
int negative_get_tool_count(magic_api * api ATTRIBUTE_UNUSED)
{
return (1);
return (negative_NUM_TOOLS);
}
// Load our icon:
SDL_Surface *negative_get_icon(magic_api * api, int which ATTRIBUTE_UNUSED)
SDL_Surface *negative_get_icon(magic_api * api, int which)
{
char fname[1024];
snprintf(fname, sizeof(fname), "%s/images/magic/negative.png", api->data_directory);
snprintf(fname, sizeof(fname), "%s/images/magic/%s", api->data_directory, negative_icon_filenames[which]);
return (IMG_Load(fname));
}
// Return our name, localized:
char *negative_get_name(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
char *negative_get_name(magic_api * api ATTRIBUTE_UNUSED, int which)
{
return (strdup(gettext_noop("Negative")));
return (strdup(gettext_noop(negative_names[which])));
}
// Return our description, localized:
char *negative_get_description(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode)
char *negative_get_description(magic_api * api ATTRIBUTE_UNUSED, int which, int mode)
{
if (mode == MODE_PAINT)
return (strdup(gettext_noop("Click and drag the mouse around to make your painting negative."))); /* Does this make more sense? */
else if (mode == MODE_FULLSCREEN)
return (strdup(gettext_noop("Click to turn your painting into its negative.")));
int mode_idx;
if (mode == MODE_PAINT) {
mode_idx = 0;
} else if (mode == MODE_FULLSCREEN) {
mode_idx = 1;
} else {
return NULL;
}
return(strdup(gettext_noop(negative_descs[which][mode_idx])));
}
static void negative_calc(void *ptr, int which, Uint8 r, Uint8 g, Uint8 b, Uint8 * new_r, Uint8 * new_g, Uint8 * new_b) {
float h, s, v, new_h;
magic_api *api = (magic_api *) ptr;
if (which == TOOL_NEGATIVE)
{
*new_r = 0xFF - r;
*new_g = 0xFF - g;
*new_b = 0xFF - b;
}
else
return (NULL);
{
api->rgbtohsv(r, g, b, &h, &s, &v);
new_h = h + 180.0;
if (new_h >= 360.0)
{
new_h = new_h - 360.0;
}
api->hsvtorgb(new_h, s, v, new_r, new_g, new_b);
}
}
// Callback that does the negative color effect on a circle centered around x,y
static void do_negative(void *ptr, int which ATTRIBUTE_UNUSED, SDL_Surface * canvas, SDL_Surface * last, int x, int y)
static void do_negative(void *ptr, int which, SDL_Surface * canvas, SDL_Surface * last, int x, int y)
{
int xx, yy;
Uint8 r, g, b;
Uint8 r, g, b, new_r, new_g, new_b;
magic_api *api = (magic_api *) ptr;
for (yy = y - 16; yy < y + 16; yy++)
@ -119,12 +173,8 @@ static void do_negative(void *ptr, int which ATTRIBUTE_UNUSED, SDL_Surface * can
if (api->in_circle(xx - x, yy - y, 16))
{
SDL_GetRGB(api->getpixel(last, xx, yy), last->format, &r, &g, &b);
r = 0xFF - r;
g = 0xFF - g;
b = 0xFF - b;
api->putpixel(canvas, xx, yy, SDL_MapRGB(canvas->format, r, g, b));
negative_calc(api, which, r, g, b, &new_r, &new_g, &new_b);
api->putpixel(canvas, xx, yy, SDL_MapRGB(canvas->format, new_r, new_g, new_b));
}
}
}
@ -175,19 +225,15 @@ void negative_click(magic_api * api, int which, int mode,
else
{
int xx, yy;
Uint8 r, g, b;
Uint8 r, g, b, new_r, new_g, new_b;
for (yy = 0; yy < canvas->h; yy++)
{
for (xx = 0; xx < canvas->w; xx++)
{
SDL_GetRGB(api->getpixel(last, xx, yy), last->format, &r, &g, &b);
r = 0xFF - r;
g = 0xFF - g;
b = 0xFF - b;
api->putpixel(canvas, xx, yy, SDL_MapRGB(canvas->format, r, g, b));
negative_calc(api, which, r, g, b, &new_r, &new_g, &new_b);
api->putpixel(canvas, xx, yy, SDL_MapRGB(canvas->format, new_r, new_g, new_b));
}
}
@ -240,3 +286,4 @@ int negative_modes(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
{
return (MODE_PAINT | MODE_FULLSCREEN);
}